The 2nd and subsequent rounds are slightly different. You show both your BTC balances (as before) and your balance in bytes. You have a sort of basket that consists of a mixture of BTC and bytes. To determine the weight of the basket, every 62.5 MB are counted as 1 BTC. For example, if you have 125 MB and 3 BTC, the weight is 2+3=5 BTC. The distribution of new bytes on the 2nd and subsequent stages is proportional to the weight of your basket.
how yu verif BBs solde for the next distribute ? should we send BBs on bytes adresse and submit a micro pay like btc ?
No, you don't have to make a micropayment in bytes. You just tell (the chatbot) your Byteball address. This is the same address that will receive the new bytes, so there's no point in lying and telling somebody else's address.